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Extract from the Register of European Patents

EP About this file: EP3850478

EP3850478 - SYSTEM AND METHOD OF OPTIMIZING INSTRUCTIONS FOR QUANTUM COMPUTERS [Right-click to bookmark this link]
StatusNo opposition filed within time limit
Status updated on  20.03.2026
Database last updated on 28.03.2026
FormerThe patent has been granted
Status updated on  11.04.2025
FormerGrant of patent is intended
Status updated on  03.12.2024
FormerRequest for examination was made
Status updated on  18.06.2021
FormerThe international publication has been made
Status updated on  21.03.2020
Most recent event   Tooltip20.03.2026No opposition filed within time limitpublished on 22.04.2026 [2026/17]
Applicant(s)For all designated states
The University of Chicago
5113 S. Harper Avenue
Suite 2C
Chicago, IL 60615 / US
[2021/29]
Inventor(s)01 / CHONG, Frederic T.
5113 S. Harper Avenue Suite 2C
Chicago, Illinois 60615 / US
02 / SHI, Yunong
5113 S. Harper Avenue Suite 2C
Chicago, Illinois 60615 / US
03 / LEUNG, Nelson
5113 S. Harper Avenue Suite 2C
Chicago, Illinois 60615 / US
04 / GOKHALE, Pranav
5113 S. Harper Avenue Suite 2C
Chicago, Illinois 60615 / US
05 / HOFFMANN, Henry
5113 S. Harper Avenue Suite 2C
Chicago, Illinois 60615 / US
06 / SCHUSTER, David
5113 S. Harper Avenue Suite 2C
Chicago, Illinois 60615 / US
 [2021/29]
Representative(s)Dehns
10 Old Bailey
London EC4M 7NG / GB
[2025/20]
Former [2021/29]Dehns
St. Bride's House
10 Salisbury Square
London EC4Y 8JD / GB
Application number, filing date19858809.712.09.2019
[2021/29]
WO2019US50870
Priority number, dateUS201862730813P13.09.2018         Original published format: US 201862730813 P
US201862773581P30.11.2018         Original published format: US 201862773581 P
[2021/29]
Filing languageEN
Procedural languageEN
PublicationType: A1 Application with search report
No.:WO2020056176
Date:19.03.2020
Language:EN
[2020/12]
Type: A1 Application with search report 
No.:EP3850478
Date:21.07.2021
Language:EN
The application published by WIPO in one of the EPO official languages on 19.03.2020 takes the place of the publication of the European patent application.
[2021/29]
Type: B1 Patent specification 
No.:EP3850478
Date:14.05.2025
Language:EN
[2025/20]
Search report(s)International search report - published on:US19.03.2020
(Supplementary) European search report - dispatched on:EP02.05.2022
ClassificationIPC:G06F8/41, G06F9/48, G06N10/80, // G06N5/00
[2022/22]
CPC:
G06F8/456 (EP); G06F8/443 (EP,US); G06F9/48 (US);
G06F9/4881 (EP); G06N10/80 (EP,US); G06F8/41 (US);
G06F8/47 (US); G06N5/01 (EP); H03K3/00 (US);
H03K5/00 (US) (-)
Former IPC [2021/29]G06F8/41, G06F9/50
Designated contracting statesAL,   AT,   BE,   BG,   CH,   CY,   CZ,   DE,   DK,   EE,   ES,   FI,   FR,   GB,   GR,   HR,   HU,   IE,   IS,   IT,   LI,   LT,   LU,   LV,   MC,   MK,   MT,   NL,   NO,   PL,   PT,   RO,   RS,   SE,   SI,   SK,   SM,   TR [2021/29]
Extension statesBANot yet paid
MENot yet paid
Validation statesKHNot yet paid
MANot yet paid
MDNot yet paid
TNNot yet paid
TitleGerman:SYSTEM UND VERFAHREN ZUR OPTIMIERUNG VON BEFEHLEN FÜR QUANTENRECHNER[2021/29]
English:SYSTEM AND METHOD OF OPTIMIZING INSTRUCTIONS FOR QUANTUM COMPUTERS[2021/29]
French:SYSTÈME ET PROCÉDÉ D'OPTIMISATION D'INSTRUCTIONS POUR ORDINATEURS QUANTIQUES[2021/29]
Entry into regional phase11.03.2021National basic fee paid 
11.03.2021Search fee paid 
11.03.2021Designation fee(s) paid 
11.03.2021Examination fee paid 
Examination procedure11.03.2021Examination requested  [2021/29]
29.11.2022Amendment by applicant (claims and/or description)
04.12.2024Communication of intention to grant the patent
03.04.2025Fee for grant paid
03.04.2025Fee for publishing/printing paid
03.04.2025Receipt of the translation of the claim(s)
Opposition(s)17.02.2026No opposition filed within time limit [2026/17]
Fees paidRenewal fee
11.09.2021Renewal fee patent year 03
16.08.2022Renewal fee patent year 04
24.08.2023Renewal fee patent year 05
13.08.2024Renewal fee patent year 06
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Patent Court		 See the Register of the Unified Patent Court for opt-out data
Responsibility for the accuracy, completeness or quality of the data displayed under the link provided lies entirely with the Unified Patent Court.
Lapses during opposition  TooltipAT14.05.2025
BG14.05.2025
CZ14.05.2025
DK14.05.2025
EE14.05.2025
ES14.05.2025
FI14.05.2025
HR14.05.2025
IT14.05.2025
LV14.05.2025
NL14.05.2025
PL14.05.2025
RO14.05.2025
SK14.05.2025
SM14.05.2025
NO14.08.2025
RS14.08.2025
GR15.08.2025
IS14.09.2025
PT15.09.2025
[2026/10]
Former [2026/09]AT14.05.2025
BG14.05.2025
CZ14.05.2025
DK14.05.2025
ES14.05.2025
FI14.05.2025
HR14.05.2025
LV14.05.2025
NL14.05.2025
PL14.05.2025
SM14.05.2025
NO14.08.2025
RS14.08.2025
GR15.08.2025
IS14.09.2025
PT15.09.2025
Former [2026/08]AT14.05.2025
BG14.05.2025
DK14.05.2025
ES14.05.2025
FI14.05.2025
HR14.05.2025
LV14.05.2025
NL14.05.2025
PL14.05.2025
SM14.05.2025
NO14.08.2025
RS14.08.2025
GR15.08.2025
IS14.09.2025
PT15.09.2025
Former [2025/49]AT14.05.2025
BG14.05.2025
ES14.05.2025
FI14.05.2025
HR14.05.2025
LV14.05.2025
NL14.05.2025
PL14.05.2025
NO14.08.2025
RS14.08.2025
GR15.08.2025
IS14.09.2025
PT15.09.2025
Former [2025/48]AT14.05.2025
BG14.05.2025
ES14.05.2025
FI14.05.2025
HR14.05.2025
NL14.05.2025
PL14.05.2025
NO14.08.2025
RS14.08.2025
GR15.08.2025
PT15.09.2025
Former [2025/47]BG14.05.2025
ES14.05.2025
FI14.05.2025
NL14.05.2025
PL14.05.2025
NO14.08.2025
GR15.08.2025
PT15.09.2025
Former [2025/46]ES14.05.2025
FI14.05.2025
PT15.09.2025
Documents cited:Search[I] US2003121028  (COURY MICHAEL et al.) [I] 1-15 * paragraphs [0025] , [0041] , [0043] , [0046] , [0060] , [0061] , [0075] * * figures 1, 2A *
 [A] US2017308803  (WALLMAN JOEL J et al.) [A] 1-15 * paragraphs [0018] - [0021] - [0024] - [0026] - [0032] , [0041] , [0042] * * figure 1 *
 [A]   ALI JAVADIABHARI ET AL: "ScaffCC", COMPUTING FRONTIERS, ACM, 2 PENN PLAZA, SUITE 701 NEW YORK NY 10121-0701 USA, 20 May 2014 (2014-05-20), pages 1 - 10, XP058051325, ISBN: 978-1-4503-2870-8, DOI: 10.1145/2597917.2597939 [A] 1-15 * sections 1-4 * * figure 1 *

DOI:   http://dx.doi.org/10.1145/2597917.2597939
International search[A] US2009254892  (YAMASHITA KOICHIRO et al.) [A] 1-3, 8-10, 15-17, 21 * ; abstract; para [0045], [0046], [0049], [0050], [0055] *
 [A] US2013036409  (AUERBACH JOSHUA S et al.) [A] 1-3, 8-10, 15-17, 21 * ; abstract; para [0017], [0025], [0056] *
 [A] US8527973  (LITTLE JOHN N et al.) [A] 1-3, 8-10, 15-17, 21 * ; col 4, lines 10-12; col 14, lines 44-47; col 15, lines 3-6; col 50, lines 58-60; col 52, lines 24-27 *
The EPO accepts no responsibility for the accuracy of data originating from other authorities; in particular, it does not guarantee that it is complete, up to date or fit for specific purposes.